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    Posted by Andrew West on June 2, 2005, 11:15 pm, in reply to "Re: Mercedes ML 320 T REG. OK on LPG. No good on petrol"

    Hello John,
    Is the lpg system fitted sequential injection or just a single point venturi mixer system?
    Lpg is harder to ignite than petrol & puts more load on the ignition system & therefore usually shows up any ignition weaknesses when running on lpg as oposed to petrol.
    I would have thought that it has a sequential injection system fitted & it could be that the petrol ecu is "learning away" because the fuel trims that it is trying to perform aren't having any effect.
    Usually if you clear the fault codes & then run on petrol & drive the car (if you can) it will re-adapt to run on petrol.
    I may be totally wrong but i have had this occur on a few different lpg converted vehicles.
    Hope this helps & doesn't send you on a wild goose chase,
    Regards Andrew

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